SynTherm® – Insulating Materials SynTherm® APA/50

SynTherm® APA/50 is a flexible 3-ply insulating material made of polyester film with a layer of aramid paper marked with yellow stripes on both sides.

The proven dielectric properties of the polyester film and the excellent mechanical and thermal properties of the outer aramid paper layers result in a high performance insulating material. The ability of the outer layers to absorb impregnants results in exceptional bonding between all winding components.

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Application

SynTherm® APA/50 is a cost-effective insulating material which can be installed in suitable insulating systems of class H (180 °C) and is used in electric motors as slot insulation, phase insulation and wedges.

SynTherm® APA 50 is used as core, interlayer and final insulation for transformers.

Standards

  • Suitable for class H (180 °C) systems
  • UL approved e.g. E247773

Delivery forms

Total thicknesses in µm:
130, 160, 180, 220, 240, 310, 370, 410, 470. Further thicknesses on request.

SynTherm® APA/50 is available:

  • in tapes: depending on material thickness on request beginning at 6 mm (thin material)
  • in rolls: 968 mm

Feathering:

  • Depth approx. 1-12 mm; distance approx. 1-10 mm
  • Form widths of 10 mm to 240 mm, thickness on request

Base

PET-film + aramid paper on both sides

Punched parts, bent & formed parts

We offer a wide range of punched and formed parts: Rolls, individual parts unsorted, sorted or stacked, adhesive on one or both sides, non-adhesive, with or without a grip tab.

 

More about punched parts

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Technical data

Typical mechanical properties
Property Unit of measure Test method
Nominal thickness mm 0.13 0.16 0.18 0.22 0.24 0.31 0.37 0.41 0.47 IEC 60626-2
Typical thickness mm 0.13±15 % 0.16±15 % 0.18±15 % 0.21±15 % 0.24±15 % 0.30±15 % 0.36±10 % 0.40±10 % 0.46±10 %
Specific weight g/m² 120 160 190 230 260 350 440 510 570 IEC 60626-2
Film thickness µm 23 50 75 100 125 190 250 300 350
Aramid paper thickness µm 50 50 50 50 50 50 50 50 50
Tensile strength longitudinal N/cm 100 130 160 190 210 290 340 400 450 IEC 60626-2
Tensile strength transversal N/cm 70 100 140 170 200 300 420 350 400 IEC 60626-2
Typical electrical properties
Property Unit of measure Test method
Nominal thickness mm 0.13 0.16 0.18 0.22 0.24 0.31 0.37 0.41 0.47
Dielectric strength kV 6 9 12 14 16 22 25 26 28 IEC 60626-2